CN102306778B - Nonaqueous electrochemical battery and preparation method thereof - Google Patents

Nonaqueous electrochemical battery and preparation method thereof Download PDF

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Publication number
CN102306778B
CN102306778B CN2011102581176A CN201110258117A CN102306778B CN 102306778 B CN102306778 B CN 102306778B CN 2011102581176 A CN2011102581176 A CN 2011102581176A CN 201110258117 A CN201110258117 A CN 201110258117A CN 102306778 B CN102306778 B CN 102306778B
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Prior art keywords
lithium
negative pole
anodal
electrochemical battery
capacity
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CN102306778A (en
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何献文
劳忠奋
潘文硕
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Huizhou Desay Battery Technology Co., Ltd.
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Huizhou Huiderui Lithium Electrode Technology Co Ltd
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Priority to CN2011102581176A priority Critical patent/CN102306778B/en
Priority to EP11871789.1A priority patent/EP2752924A4/en
Priority to PCT/CN2011/079487 priority patent/WO2013029282A1/en
Priority to US13/818,299 priority patent/US20130302699A1/en
Publication of CN102306778A publication Critical patent/CN102306778A/en
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    • H—ELECTRICITY
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    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
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    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
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    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/381—Alkaline or alkaline earth metals elements
    • H01M4/382—Lithium
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
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    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M2010/4292—Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
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    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/49115—Electric battery cell making including coating or impregnating

Abstract

The invention belongs to the field of chemical batteries, and discloses a nonaqueous electrochemical battery and a preparation method thereof. The electrochemical battery comprises a positive electrode current collector, a negative electrode, an electrolyte and a diaphragm, wherein the positive electrode current collector comprises a positive electrode coating layer and a positive electrode coating layer wholely acting as the positive electrode; lugs are arranged on the current collector and the negative electrode; the negative electrode is metal lithium or lithium aluminum alloy; the ratio of the capacity per unit area of the positive electrode to that of the negative electrode is less than 1.0; and the ratio of the theoretical total capacity of the positive electrode to that of the negative electrode is greater than 1.0. In the preparation method, when the positive electrode diaphragm and the negative electrode are stacked by the diaphragm, the initial end of the positive electrode and the initial end of the negative electrode are stacked in a malposition way. By adopting the process, the processing short circuit rate is reduced, and the safety property of the battery is improved greatly on the premise of ensuring the high-current discharge capability.

Description

A kind of nonaqueous electrochemical battery and preparation method thereof
Technical field
The present invention relates to a kind of chemical cell field, relate in particular to a kind of nonaqueous electrochemical battery and preparation method thereof.
Background technology
At present the variation of electronic device, the update at full speed of miniaturization have impelled the progress of battery, require the battery specific energy, specific power is high, the life-span is long, price is suitable, easy to use.The develop rapidly of compact electric apparatus makes Small Civil Battery Market quantity of order require to be multiplied, and require wide in variety, shelf-life long, capacity is high, volume is little.Battery of lithium-iron disulphide has adapted to this development trend well.As battery of lithium-iron disulphide, between the security performance that good large current discharging capability is become reconciled, find balance.If in the battery, there is more residue negative electrode active material in negative electrode active material more than positive active material in the battery after reaction, because lithium is high energy capacity material, has certain potential safety hazard; Because positive pole ear of lithium battery normal operation steel band or nickel strap are comparatively sharp-pointed, easily pierce through barrier film at extreme case again, cause internal short-circuit of battery and cause serious accident, therefore need to adopt the certain measure protection.When heavy-current discharge, battery can react only has aspectant part, and the lithium band is very little, can be in the fracture of discharge later stage, thus cause battery can't emit theoretic capacity.CN1659729 relates to a kind of nonaqueous cell, it comprises lithium metal foil anode and cathode, this coating comprises the ferrous disulfide as active material, its floating coat is added in a surface of metallic substrates at least, this metallic substrates plays cathode current collector, but still there is the problem of short circuit ratio height and potential safety hazard in this invention.
Summary of the invention
For above-mentioned technical problem, the technical issues that need to address of the present invention are to have reduced the processing procedure short circuit ratio, under the prerequisite that ensures large current discharging capability, make the security performance of battery that obvious improvement arranged.Namely between the fail safe of the large current discharging capability of battery and battery, average out.
The technical problem to be solved in the present invention is achieved through the following technical solutions: a kind of nonaqueous electrochemical battery, comprise and have anodal coating and whole as anodal plus plate current-collecting body, negative pole, electrolyte and barrier film, be equipped with lug on described collector and the negative pole, described negative pole is lithium metal or lithium-aluminium alloy; The weight ratio of each composition of described anodal coating is pyrite: conductive carbon black: graphite: additive: bonding agent (80-90): (0.5-4): (1-4): (0-4): (1-4); The ratio of the capacity of anodal unit are and the capacity of negative pole unit are is less than 1.0; The ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole is greater than 1.0.
Further: in above-mentioned nonaqueous electrochemical battery, described additive is MnO 2, TiO 2, LiCoO 2, LiMnO 2, LiNiO 2, Li 2TiO 3, Li 4Ti 5O 12In one or more mixtures.Described bonding agent is one or both the mixture among PVAC polyvinylalcohol, polyvinylidene fluoride PVDF, polytetrafluoroethylene PTFE, sodium carboxymethylcellulose CMC, SBR emulsion SBR, the 1-METHYLPYRROLIDONE NMP.The mixture of described sodium carboxymethylcellulose CMC and SBR emulsion SBR accounts for the 1-4% of pyrite weight, and perhaps the mixture of polyvinylidene fluoride PVDF and 1-METHYLPYRROLIDONE NMP accounts for the 1-4% of pyrite weight.Described pyrite FeS 2Purity is more than 90%, and particle diameter is less than 44 μ m; The average grain 5.0-18.0 μ m of graphite, BET specific area 11.0-14.0 m 2/ g, ash content account for pyrite weight less than 0.1%.
Described electrolyte is the mixture of organic solvent and inorganic lithium salt solute, described organic solvent is 1-METHYLPYRROLIDONE NMP, 1,2-propylene carbonate PC, glycol dimethyl ether DME, 1, at least two kinds mixture among 3-dioxolanes DOL, DMI DMI, tetrahydrofuran THF, dimethyl sulfoxide (DMSO) DMSO, the sulfolane SFL, described inorganic lithium salt solute is lithium perchlorate LiClO 4, trifluoromethyl sulfonic acid lithium LiCF 3SO 3, lithium hexafluoro phosphate LiPF 6, at least a or two mixture among di-oxalate lithium borate LiBOB, the lithium iodide LiI.Preferably: described inorganic lithium salt solute is lithium perchlorate LiClO 4Or lithium perchlorate LiClO 4With the mixture of di-oxalate lithium borate LiBOB or use separately lithium iodide LiI.
Described barrier film is PP and or PE and or the polyvinyl resin of PP.The maximum effective aperture of described membrane membrane is that 0.08-0.12 μ m, porosity are that 40-50%, impedance are 30-50m Ω/mm 2
Described plus plate current-collecting body is aluminium foil, and described lug is stainless steel band or nickel strap, and wherein aluminum foil thickness is 10-25 μ m, and stainless steel band or nickel strap thickness are 0.05-0.1mm.
The present invention also provides the preparation method of above-mentioned nonaqueous electrochemical battery, step is: anodal preparation, comprise pyrite, graphite, acetylene black, additive are mixed by proportioning, then add and be coated on the plus plate current-collecting body after aqueous adhesive mixes form slurry, oven dry, cut into suitable dimension after rolling certain predetermined thickness, the spot welding positive pole ear, after the anode pole piece oven dry, be lower than in relative humidity under 1% the environment, behind battery cathode, membrane winding, the box hat of packing into, add electrolyte after, slot rolling, sealing; Described positive pole, when the negative pole barrier film stacks, anodal initiating terminal is that dislocation stacks with the initiating terminal of negative pole, preferably the misalignment position size is 20-25mm.
Compared with prior art, the weight ratio of each composition of anodal coating of the present invention is pyrite: conductive carbon black: graphite: additive: bonding agent equals (80-90): (0.5-4): (1-4): (0-4): (1-4)The ratio of the capacity of anodal unit are and the capacity of negative pole unit are is less than 1.0; The ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole is greater than 1.0.The present invention is by the prescription of the anodal coating of adjusting and the capacity of both positive and negative polarity, both positive and negative polarity is levied the variation of dislocation placement location, this kind electrochemical cell and preparation method thereof has greatly reduced the processing procedure short circuit ratio, when guaranteeing certain large current discharging capability, the security performance of battery is improved greatly.
Embodiment
Purport of the present invention is to regulate the prescription of anodal coating and the capacity of both positive and negative polarity, nonaqueous electrochemical battery is had between the fail safe of large current discharging capability and battery average out, and has namely ensured the discharge of large electric current, and security performance is high again.Below in conjunction with embodiment content of the present invention is described in further detail, mentioned content is not limitation of the invention among the embodiment, and each raw-material selection can be suited measures to local conditions and the result be there is no substantial effect in the material.
Embodiment 1
According to the present invention, the standard model is that the production technology of battery of lithium-iron disulphide of AA is as follows:
Use the pyrite dust of LITHIUM BATTERY, its main component FeS 2(purity is more than 96%), graphite KS-15, acetylene black, binding agent is with CMC and SBR.Above material is added to the water in proportion, uses homogenizer to mix, the vertical luxuriant and rich with fragrance viscosimeter test of pool is used in fully moistening and mixing, obtains viscosity at the mud shape slurry of 5000～8000 centipoises.
With this mud shape slurry, use the transfer type coating apparatus, be coated on the aluminium foil base band surface of 0.018mm thickness.Adjust the transfer type coating apparatus, with the step aluminium foil base band surface that is coated in of mud shape slurry, every coating 280mm is long, vacant 10mm does not apply slurry, adjust simultaneously the transfer type coating apparatus, so that be coated in each lip-deep mud shape slurry of aluminium foil base band, be issued to 20.02mg/cm at the state of drying fully 2Unit plane density.After aluminium foil base band two sides all applied mud shape slurry and oven dry, suppress, THICKNESS CONTROL is at about 0.18mm after the compacting.Again the coating that suppresses is cut the monolithic of the wide 39mm of growth 275mm, wherein the long length that is coated with mud shape slurry of 270mm and the space length of the uncoated mud shape of 5mm slurry of comprising of 275mm.At the position of the uncoated mud shape of 5mm slurry, use device for ultrasonic welding, weld the nickel metal tape of the wide 0.1mm thickness of the long 2mm of 55mm, namely as positive plate.
Wide with the thick 38mm of 0.15mm, the lithium metal foil band of purity more than 99.9% be as negative pole, with the stainless steel strip pressure viscosity of the wide 0.2mm thickness of the long 4mm of the 36mm end at a long lithium metal foil band of 270mm, namely as negative plate.
The thick UPE3085 polyethylene resin film of the 0.025mm that use is bought from UBE is as barrier film.
Use winding apparatus with above-mentioned positive plate, negative plate and membrane coil together, make them become a cylindrical battery core.When the coiling battery core, first barrier film is wrapped in a bit of barrier film of reeling on the winding needle, about 5mm distance, add again positive plate, with positive plate reel a bit of after, about 25mm, add again negative plate, finish the process that the three is wound into cylindrical battery core, the final cutting barrier film wraps battery core, uses gummed paper to paste into a monomer battery core.
The negative electrode lug that ready-made battery core one end is stretched out is folded to the battery core end face with 90 °, the shell of packing into behind the adding insulation spacer, and shell is the nickel-plated steel shell of external diameter 13.9mm, and negative electrode lug is welded together by welding equipment and outer casing bottom.
The capacity of anodal unit are is provided by following calculating with the ratio of the capacity of negative pole unit are:
The capacity of anodal unit are=［ (anode dressing amount, 4.14g) ╳ (FeS 2Dry weight percentage, 0.90) ╳ (FeS 2Purity percentage, 0.96) ╳ (FeS 2Energy density 893.58mAh/g) ］/(anode dressing length, 270mm) ╳ (anode dressing width, 39mm) ］=0.3034mAh/mm 2
The capacity of negative pole unit are=(negative pole weight, 0.82g) ╳ (Li purity percentage, 0.999) ╳ (Li energy density 3861.7mAh/g) ］/(negative pole length, 270mm) ╳ (negative pole width, 38mm) ］=0.3083mAh/mm 2
Capacity=the 0.3034/0.3083=0.9843 of the capacity of the ratio of the capacity of anodal unit are and the capacity of negative pole unit are=anodal unit are/negative pole unit are.
The ratio of anodal theoretical total capacity and negative pole theory total capacity is by following calculating:
Anodal theoretical total capacity=(anode dressing amount, 4.14g) ╳ (FeS 2Dry weight percentage, 0.90) ╳ (FeS 2Purity percentage, 0.96) ╳ (FeS 2Energy density 893.58mAh/g)=3196.3mAh;
The theoretical total capacity of negative pole=(negative pole weight, 0.82g) ╳ (Li purity percentage, 0.999) ╳ (Li energy density 3861.7mAh/g)=3163.4mAh;
Theoretical total capacity=the 3196.3/3163.4=1.0104 of the ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole=anodal theoretical total capacity/negative pole.
Each battery adds 2.2g electrolyte, and electrolyte contains DOX and the glycol dimethyl ether of volume ratio 3:1, and the lithium perchlorate of 1mol/L.Anode ear and the positive cover of the battery core other end being stretched out weld again, and adopt conventional battery assembling and mouth-sealing method that battery is completed, and again battery are carried out pre-arcing.
Embodiment 2
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but be coated in each lip-deep mud shape slurry of aluminium foil base band, under the state of fully oven dry, only need reach approximately 24.23mg/cm 2Unit plane density.
Embodiment 3
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but be coated in each lip-deep mud shape slurry of aluminium foil base band, under the state of fully oven dry, only need reach approximately 16.66mg/cm 2Unit plane density.
Embodiment 4
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but use a long lithium metal foil band of 275mm to make negative plate, when the coiling battery core, positive plate adds negative plate after only being involved in approximately 20mm again, finishes the operation of coiling battery core.
Embodiment 5
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but use a long lithium metal foil band of 280mm to make negative plate, when the coiling battery core, positive plate adds negative plate after only being involved in approximately 15mm again, finishes the operation of coiling battery core.
Embodiment 6
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but use a long lithium metal foil band of 285mm to make negative plate, when the coiling battery core, positive plate adds negative plate after only being involved in approximately 10mm again, finishes the operation of coiling battery core.
Embodiment 7
With the battery of lithium-iron disulphide of the AA that makes comparisons, adopt the production technology manufacturing same with scheme 1, but use a long lithium metal foil band of 290mm to make negative plate, when the coiling battery core, positive plate adds negative plate after only being involved in approximately 5mm again, finishes the operation of coiling battery core.
Under the ratio of the capacity of different anodal unit ares and the capacity of negative pole unit are,
Battery initial discharge performance comparison sees Table 1:
The table 1 different anodal contrast of unit are discharge capacity of the cell (unit: mAh, models: FR6)
Numbering Positive and negative electrode capacity per unit area ratio 1000mA continuous discharge is to the 0.8V capacity 200mA continuous discharge is to the 1.0V capacity
Embodiment 1 0.98 2492.6 2566.6
Embodiment 2 1.19 2537.8 2600.2
Embodiment 3 0.82 2036.6 2176.6
Battery was shelved 20 days for 60 ℃ after carrying out 80% discharge (with 1000mA continuous discharge), the serviceability after being used for storing after the simulated battery partial discharge.Internal resistance of cell variation tendency sees Table 2:
Table 2 internal resistance of cell variation tendency (unit: m Ω, model: FR6)
Numbering Positive and negative electrode capacity per unit area ratio 60 ℃ 5 days 60 ℃ 10 days 60 ℃ 15 days 60 ℃ 20 days
Embodiment 1 0.98 518.5 638 672 688
Embodiment 2 1.19 856 1100 1413 >2000
Embodiment 3 0.82 329 390 386 395
Remarks: internal resistance is the test value of normal temperature shelf after 24 hours again after 60 ℃ of taking-ups.
The ratio of the capacity of the capacity of the anodal unit are of using here and negative pole unit are, can be from following calculating:
The capacity of anodal unit are=［ (anode dressing amount) ╳ (FeS 2Dry weight percentage) ╳ (FeS 2Purity percentage) ╳ (FeS 2Energy density 893.58mAh/g) ］/(anode dressing length) ╳ (anode dressing width) ］;
The capacity of negative pole unit are=(negative pole weight) ╳ (Li purity percentage) ╳ (Li energy density 3861.7mAh/g) ］/(negative pole length) ╳ (negative pole width) ］;
The capacity of the capacity of the ratio of the capacity of anodal unit are and the capacity of negative pole unit are=anodal unit are/negative pole unit are.
For fear of under extreme case (such as T6 test after heavy-current discharge, the partial discharge), lug pierces through barrier film, and the accidents such as battery is on fire, blast occur; Positive and negative electrode is placed dislocation when reeling, more than the dislocation 5mm; Barrier film overlay length before reeling, lithium band placement location and towards, positive plate placement location and towards as shown 1.And the ratio that should dislocation can cause the anodal theoretical total capacity of battery and the theoretical total capacity of negative pole is greater than 1.0.
Under the different misalignment, in the battery manufacturing process, the data of short circuit ratio are as follows after reeling, and see Table 3:
Table 3 coiling short circuit ratio contrast (model: FR6)
Numbering Misalignment position size/mm The ratio of the theoretical total capacity of positive and negative electrode The winding battery number/ The short circuit number/ Short circuit ratio
Embodiment 1 25 1.0104 4932 22 0.45%
Embodiment 4 20 0.9932 4955 26 0.52%
Embodiment 5 15 0.9751 4968 25 0.50%
Embodiment 6 10 0.9587 5005 38 0.76%
Embodiment 7 5 0.9423 4877 56 1.15%
Remarks: the determining of short circuit number, insulation resistance is less than the battery core quantity of 60M Ω under 9V voltage.
Battery discharge 50%(is with the 200mA current discharge) after, carry out the T6 test, test case sees attached list 4:
Table 4 T6 test comparison (model: FR6)
Figure 2011102581176100002DEST_PATH_IMAGE001
Under the ratio of different anodal theoretical total capacities and the theoretical total capacity of negative pole, after battery discharges fully, carry out UL1642, the situation of CRUSH test is as follows, sees Table 5:
Table 5 CRUSH test comparison (model: FR6)
Figure 2011102581176100002DEST_PATH_IMAGE002
The ratio of the theoretical total capacity of the anodal theoretical total capacity of using here and negative pole, can be from following calculating:
Anodal theoretical total capacity=(anode dressing amount) ╳ (FeS 2Dry weight percentage) ╳ (FeS 2Purity percentage) ╳ (FeS 2Energy density 893.58mAh/g);
The theoretical total capacity of negative pole=(negative pole weight) ╳ (Li purity percentage) ╳ (Li energy density 3861.7mAh/g);
The theoretical total capacity of the ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole=anodal theoretical total capacity/negative pole.
Find by the above embodiments contrast, the ratio of the capacity of the capacity of anodal unit are and negative pole unit are is less than 1.0; The ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole is greater than 1.0.The present invention is by the prescription of the anodal coating of adjusting and the capacity of both positive and negative polarity, the variation of positive/negative plate dislocation placement location, preferred misalignment position size is 20-25mm, has reduced the processing procedure short circuit ratio, when guaranteeing certain large current discharging capability, the security performance of battery is improved greatly.

Claims (8)

1. a nonaqueous electrochemical battery comprises having anodal coating and whole plus plate current-collecting body, negative pole, electrolyte and barrier film as positive pole, is equipped with lug on described plus plate current-collecting body and the negative pole, and described negative pole is lithium metal or lithium-aluminium alloy; It is characterized in that: the weight ratio of each composition of described anodal coating is pyrite: conductive carbon black: graphite: additive: bonding agent equals (80-90): (0.5-4): (1-4): (0-4): (1-4);
The ratio of the capacity of anodal unit are and the capacity of negative pole unit are is less than 1.0;
The ratio of anodal theoretical total capacity and the theoretical total capacity of negative pole is greater than 1.0;
Described bonding agent is the mixture of sodium carboxymethylcellulose CMC and SBR emulsion SBR, they account for the 1-4% of pyrite weight, perhaps bonding agent is the mixture of polyvinylidene fluoride PVDF and 1-METHYLPYRROLIDONE NMP, and they account for the 1-4% of pyrite weight;
The initiating terminal of described positive pole and the initiating terminal of negative pole are that dislocation stacks, and the misalignment position size is more than or equal to 5mm.
2. nonaqueous electrochemical battery according to claim 1, it is characterized in that: described additive is MnO 2, TiO 2, LiCoO 2, LiMnO 2, LiNiO 2, Li 2TiO 3, Li 4Ti 5O 12In one or more mixture.
3. RootAccording to nonaqueous electrochemical battery claimed in claim 2, it is characterized in that: described pyrite FeS 2Purity is more than 90%, and particle diameter is less than 44 μ m; The average grain 5.0-18.0 μ m of graphite, BET specific area 11.0-14.0 m 2/ g, ash content account for pyrite weight less than 0.1%.
4. nonaqueous electrochemical battery according to claim 1, it is characterized in that: described electrolyte is the mixture of organic solvent and inorganic lithium salt solute, described organic solvent is 1-METHYLPYRROLIDONE NMP, 1,2-propylene carbonate PC, glycol dimethyl ether DME, 1, at least two kinds mixture among 3-dioxolanes DOL, DMI DMI, tetrahydrofuran THF, dimethyl sulfoxide (DMSO) DMSO, the sulfolane SFL, described inorganic lithium salt solute is lithium perchlorate LiClO 4, trifluoromethyl sulfonic acid lithium LiCF 3SO 3, lithium hexafluoro phosphate LiPF 6, at least a among di-oxalate lithium borate LiBOB, the lithium iodide LiI.
5. nonaqueous electrochemical battery according to claim 1, it is characterized in that: described barrier film is PP acrylic resin and/or PE polyvinyl resin.
6. nonaqueous electrochemical battery according to claim 5, it is characterized in that: the maximum effective aperture of described barrier film is that 0.08-0.12 μ m, porosity are that 40-50%, impedance are 30-50m Ω/mm 2
7. nonaqueous electrochemical battery according to claim 1, it is characterized in that: described plus plate current-collecting body is aluminium foil, and described lug is stainless steel band or nickel strap, and wherein aluminum foil thickness is 10-25 μ m, and stainless steel band or nickel strap thickness are 0.05-0.1mm.
One kind according to claim 1-7 in the preparation method of the described nonaqueous electrochemical battery of any one, step is:
Anodal preparation, comprise pyrite, graphite, acetylene black, additive are mixed by proportioning, then add and be coated on the plus plate current-collecting body after bonding agent mixes form slurry, dry, roll, cut into anode pole piece, the spot welding positive pole ear, after the anode pole piece oven dry, be lower than in relative humidity under 1% the environment, behind battery cathode sheet, membrane winding, the box hat of packing into, after adding electrolyte, slot rolling, sealing;
Described positive plate, when the negative plate barrier film stacks, anodal initiating terminal is to misplace to stack with the initiating terminal of negative pole, the misalignment position size is 20-25mm.
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